package com.heima.数字字母统计;

import java.util.Scanner;

public class Tongjizifuchuan {
    public static void main(String[] args) {
        //键盘录入一个字符串
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个字符串：");
        String str = sc.next();
        //定义三个统计变量，根据字符串中的字符进行++
        int bigCount = 0;
        int smallCount = 0;
        int numberCount = 0;
        for (int i = 0; i < str.length(); i++) {
            char c=str.charAt(i);
            if (c>='a' && c<='z') {
                smallCount++;
            }else if (c>='A' && c<='Z') {
                bigCount++;
            }else{
                numberCount++;
            }
        }
        System.out.println("大写字母有："+bigCount+"个");
        System.out.println("小写字母有："+smallCount+"个");
        System.out.println("数字有："+numberCount+"个");
    }
}
